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salantis [7]
3 years ago
12

Help me!!! Please to solve this problem of o. Math

Mathematics
2 answers:
docker41 [41]3 years ago
8 0

a:-

f(x)=2x+3

\\ \rm\Rrightarrow f(1)=2(1)+3=2+3=5

\\ \rm\Rrightarrow f(-5)=2(-5)+3=-10+3=-7

\\ \rm\Rrightarrow f(a)=2a+3

\\ \rm\Rrightarrow f(a+2)=2(a+2)+3=2a+4+3=2a+7

\\ \rm\Rrightarrow f(b)=2b+3

b:-

f(x)=x+4

\\ \rm\Rrightarrow f(-2)=(-2)+4=2

\\ \rm\Rrightarrow f(3)=3+4=7

\\ \rm\Rrightarrow f(7)=7+4=11

Oksanka [162]3 years ago
6 0

Step-by-step explanation:

thank \: you

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<h3>How to calculate the area?</h3>

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1. We assume, that the number 118 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 118 is 100%, so we can write it down as 118=100%. </span>
<span>4. We know, that x is 47% of the output value, so we can write it down as x=47%. </span>
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7. Solution for what is 47% of 118

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<span>(118/x)*x=(100/47)*x       - </span>we multiply both sides of the equation by x
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<span>now we have: </span>
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